Why does the world have borders ?¿

I wonder why the world has borders.
Can you imagine a world without them ?
It`s hard to picture this. You might be thinking that everythign would be better for the world; or you might think that it´s the way in which we can destroy our precious planet. I mean if you think about it, there are borders just about everywhere. Just how our dogs mark their territory, we do also. I think we make borders so that there won`t be intrusion in our personal space. It`s like not having doors in our houses or in your bathrooms and rooms. It`s uncomfortable and insecure. Everyone wants borders. I mean if you look at it this way, the romans, the egyptians, the chinese, the greeks, the indians they all had some type of borders! Yeah, since wayy back then; so maybe it`s something that comes in a sort of natruality. What we use them for is for separating territories. We then we think of: the people. We choose to name other people “illegals” even though we´re all humans. If we didn`t have borders, you would have everyhting vandilized, everything would look really different, and in bad ways.
This is why I think we have borders.

Harms !

One of the main ways Mexico is harming the United States is by the exportation of illegal drugs throughout the Mexican-American border, which has been continued for the past years between both countries. Mexico has been distinguished being the primary distributer of these subtances to the USA; but we must be well aware that the USA is also the primary consumer of these very same drugs.
So I think that if Mexico affects the USA the USA affects Mexico with this purchase, and also they as a country affect themselves one another now that Mexico needs a worker to found &raise their crops which involves many people who dedicated themselves to legally plant and work let themselves become bribed knowing their future will only be poverty. This leads to the corruption of those peasants and expanding the corruption to those in their country, damaging our future, which are our children.
This is how I believe how they harm each other due to the fact that they are frontiers. And there is the facility of the contrabander of drugs and of course taking advantage of a rich country like ours with the corruption that exists in Mexico and Mexcio at its time taking advantage of the riches and the interests that are part of the United States.

Smuggling

Smuggling Fruit over the Mexican border is an illegal act according to a policy of the Mexican American border. If you bring fruits &certain meats to the US illegally, you will have to pay a fine about four times it's legal price. The reason they forbid certain fruits across the border is because of certain diseases &insects they may contain. It helps a lot to not allow these foods becasuse it can prevent us from becoming sick, making it a better environment for everyone. :]